Sole for a boot



FIG. 1 is a front elevational view of a sole for a boot showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a left side view thereof.

The broken line showing of a boot upper, in FIGS. 1-6, is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a sole for a boot, as shown. 